Electric heat control means for refrigerators



y 8. 1940. w. G. DAHL 2,202,373

ELECTRIC HEAT CONTROL MEANS FOR REFRIGERATORS Filed Nov. 6. 1936 IN VENTOR.

W552 EX 6 0/1/72 ATTdRNEY Patented May 1940 UNITED STATES PATENT OFFICEWestley G. Dahl, Montrose, Calif., assignor to Thomas H. Harrison,Burbank, Calif.

Application November 6, 1936, Serial No. 109,462

14 Claims.

My invention relates to means for controlling the heat for gasrefrigerators.

One of the principal objects of this invention is to provide an electricheating means for gas refrigerators, thereby greatly reducing firehazards, and the inconvenience of obtaining fuel gas and the provisionof elaborate fuel gas control means, and to provide a. means incombination therewith for reliably controlling such heat.

Another important object of this invention is the provision of suchcontrol means which is controlled by and dependent upon the gas pressurewithin cooling portion, such as, the condenser and absorber, of therefrigerating system.

A further object of this invention is the provision of anelectrically'operated control means.

Another object of this invention is the provision of a simply andeconomically constructed mechanism for effecting these functions, andone which will not readily deteriorate or get out of order.

With these and other objects in view, as will appear hereinafter, Ihave. devised such a control means having certain novel features ofconstruction combination, and arrangement of parts and portions, as willbe hereinafter described in detail and particularly set forth in theappended claims, reference being had to the accompanying drawing and tothe characters of reference thereon, which form a part of thisapplication, in which:

The figure of the drawing is a diagrammatic view of a gas refrigeratorsystem showing my electric heat control means embodied therein, the gasrefrigerator system, consisting of prior art structure, being showndiagrammatically, and the parts and features illustrating my presentinvention being shown in section.

The refrigerating apparatus or mechanism is similar to the Electroluxrefrigerator now in common use. As far as the present invention isconcerned it consists essentially of a gas generator A, a box coolingevaporator coil B, a gas heat exchanger C, a condenser D, and anabsorber E which contains refrigerating fluid under pressure. 1

In the embodiment of my invention, as illustrated-in the drawing, I haveprovided a pressure tank I which is connected, by a pipe 2, to theabsorber E, and, by a pipe 3, to the condenser D.

The tank or reservoir has a pressure yieldable diaphragm 4 at one end,thedistortion of which controls and regulates the refrigerator bycontrolling the heating means H of the generator A. This heating meansis an electric element, which is heated by a source of electric energy,which in this instance is a storage battery l2. One wire I3 directlyconnects the element to the battery. The other wire I4 is connected tomultiple contact rheostat [5 having a pivoted controller l6. 5 Againstthe diaphragm, and preferably in axial alinement with the tank l is aplunger 2! which is resiliently forced against the diaphragm by amanually adjustable pressure regulator or temperature control. Betweenthe latter control and 10 the plunger is a compression spring 23.

A control lever B! is. pivotally mounted at one end 3H and is adapted tobe oscillated near its pivot by knife edges Zi of the'plunger. The freeend of the lever is pivotally connected with the 15 controller. Thislever also may be connected by a wire 32 to the battery.

As the diaphragm is forced outwardly, the lever 3| is rocked and thecontroller l6 rotated to engage contacts of the rheostat and thereby add20 resistance between the source electrical energy and the heatingelement ii. Full rotation of the controller It breaks the circuit to theheating element, which condition continues until the diaphragm 4L isdrawn inwardly.

Though I have shown and described a particu lar construction, I do notwish to be limited to the same, but desire to include in the scope of myinvention the construction, combination, and arrangement as set forth inthe appended claims.

I claim: r

1. In a heat control means for refrigerators, a generator, means forheating the same, cooling means connected with the generator, a gaspressure reservoir connected with the cooling means, 35 a diaphragmforming part of the reservoir, means for controlling the heating means,and a manual adjusting means operatively connecting the diaphragm withthe controlling means for readily and quickly varying the responsivenessof the 49 heat control means.

2. In a heat control means for refrigerators, a generator, means forheating the same, cooling means connected with the generator, a gaspressure reservoir connected with the cooling means, 4,5 a diaphragmforming part of the reservoir, means for controlling the heating means,a plunger in operative engagement with the diaphragm, and a lever meansoperatively connecting the plunger with the control means.

3. In a heat control means for refrigerators, a generator, means forheating the same, cooling means connected with the generator, a gaspressure reservoir connected with the cooling means, a diaphragm formingpart of the reservoir, means for controlling the heating means, aplunger in operative engagement with the-diaphragm, and a lever pivotedat one end and shiftable intermediate its ends by the plunger, the freeend of the lever being connected to the control means.

4. In a heat control means for refrigerators, a generator, means forheating the same, cooling means connected with the generator, a gaspressure reservoir connected with the cooling means, a diaphragm formingpart of the reservoir, means for controlling the heating means, anadjustable plunger resiliently held in operative engagement with thediaphragm, and a lever means operatively connecting the plunger with thecontrol means.

5 In a heat control means for refrigerators, a generator, means forheating the same, cooling means connected with the generator, 9. gaspressure reservoir connected with the cooling means, a diaphragm formingpart of the reservoir, means for controlling the heating means, anadjustable plunger resiliently held in operative engagement with thediaphragm, and a lever pivoted at one end and shiftable intermediate itsends by the plunger, the free end of the lever being connected to thecontrol means.

6. In a heat control means for refrigerators, a a generator, an electricmeans for heating the same, cooling means connected with the gener ator,a gas pressure reservoir connected with the cooling means, a diaphragmforming part of the reservoir, a rheostat for the electric heatingmeans, and a manually adjusting means operatively connecting thediaphragm with the rheo= stat.

7. In a heat control means for refrigerators, a generator, an electricmeans for heating the same, cooling means connected with the generator,2. gas pressure reservoir connected to the cooling means, a diaphragmforming part of the reservoir, a rheostat for controlling the heatingmeans, a plunger in operative engagement with the diaphragm, and a levermeans operatively connecting the plunger with the rheostat.

8. In a heat control means for refrigerators, a generator, an electricmeans for heating the same,

cooling means connected with the generator, at gas pressure reservoirconnected to the cooling means, a diaphragm forming part of thereservoir, a rheostat for controlling the heating means, a plunger inoperative engagement with the diaphragm, and a lever pivoted at one endand shiftable intermediate its ends hr the plunger, the

free end of the lever being connected to the rheostat.

9. In a heat control e for refrigerators, a

generator, an electric means for heating the same, I cooling meansconnected with the generator, a

gas pressure reservoir connected to the cooling means, a diaphragmforming part of the reservoir, a rh eostat for controlling the heatingmeans, an adjustable plunger resiliently held in operative engagementwith the diaphragm, and a lever means operatively connecting the plungerwith the rheostat.

10. In a heat control means for refrigerators, a generator, an electricmeans for heating the same, cooling means connected with the generator,a gas pressure reservoir connected to the cooling means, a diaphragmforming part; of the reservoir, a rheostat for controlling the heatingmeans, and a lever pivoted at one end and shiftable intermediate itsends by the diaphragm, the free end of the lever being connected to therheostat.

11. In a heat control'means for refrigerators, a generator, an electricmeans for heating the same, cooling means connected with the generator,a gas pressure reservoir connected with the cooling means, a diaphragmforming part of the reservoir, a pivoted lever shiftable about its pivotby the diaphragm, and a rheostat connected to the heating-means forcontrolling the electric energy thereto, said rheostat having an armoperatively connected to the lever.

12. In a heat control means for refrigerators, a generator, an electricmeans for heating the same, cooling means connected with the generator,9. gas reservoir connected with the cooling means, operating means inconnection with the generator and responsive to the physical conditionsof the gas in the cooling means, and a rheostat tor the electric heatingmeans, said rheostat being operatively connected with said operatingmeans.

13. In a heat control means for refrigerators, a generator, an electricmeans for heating the same, cooling means connected with the generator,9. gas reservoir connected with the cooling means, operating means inconnection with the generator and responsive to the physical conditionsoi the gas in the cooling means, a rheostat for the electric heatingmeans, and a manual adjusting means connecting the operating means withthe rheostat.

14. In a heat control means for refrigerators, a generator, an electricmeans for heating the same, cooling means connected with the generator,a gas reservoir connected with the cooling means, operating means inconnection with the generator and responsive to the physical conditionsof the gas in'the cooling means, and a rheostat connected to the heatingmeans for controlling the electric energy thereto, said rheostat havingan arm operatively connected to said operating means.

WESTIEY G. DAHL.

